// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-%typedarray%.from
description: >
  Custom constructor can return any TypedArray instance with higher or same
  length
info: |
  %TypedArray%.from ( source [ , mapfn [ , thisArg ] ] )

  ...
  7. If usingIterator is not undefined, then
    a. Let values be ? IterableToList(source, usingIterator).
    b. Let len be the number of elements in values.
    c. Let targetObj be ? TypedArrayCreate(C, «len»).
  ...
  10. Let len be ? ToLength(? Get(arrayLike, "length")).
  11. Let targetObj be ? TypedArrayCreate(C, « len »).
  ...
includes: [testTypedArray.js]
features: [Symbol.iterator, TypedArray]
---*/

function Test() {
    var sourceItor = [1, 2];
    var sourceObj = {
      length: 2
    };

    testWithTypedArrayConstructors(function(TA) {
      var result;
      var custom = new TA(2);
      var ctor = function() {
        return custom;
      };

      result = TypedArray.from.call(ctor, sourceItor);
      assert.sameValue(result, custom, "using iterator, same length");

      result = TypedArray.from.call(ctor, sourceObj);
      assert.sameValue(result, custom, "not using iterator, same length");

      custom = new TA(3);

      result = TypedArray.from.call(ctor, sourceItor);
      assert.sameValue(result, custom, "using iterator, higher length");

      result = TypedArray.from.call(ctor, sourceObj);
      assert.sameValue(result, custom, "not using iterator, higher length");
    });
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
